Utilizing tension reduction in a dielectric elastomer actuator to produce compression for physiological application
Utilizing tension reduction in a dielectric elastomer actuator to produce compression for physiological application
复制标题
利用介电弹性体致动器中的张力减少来产生生理应用的压缩
DOI：
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发表时间：
2018
期刊：
影响因子：
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通讯作者：
A. Salehian
中科院分区：
文献类型：
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作者：
Hamza Edher;Louise Maupas;Sunraaj Nijjer;A. Salehian
一种常见的预防外周血管疾病的方法是使用气动主动压迫系统。虽然有效，但传统的主动压缩系统需要使用空气压缩机和泵，因此不适合移动使用。目前的工作介绍了一种新的方法来开发可移动的基于智能材料的主动压缩系统。该驱动系统由一个带状机构和一个多层介质弹性体作动器连接而成。皮带机构允许通过电压施加直接施加压缩。通过这样做，建议的设计限制了执行器应该充电的时间段，并提高了系统的功率效率和寿命。提出了一种定义驱动系统在施加电压前施加预紧力的解析模型，并进行了实验验证。给出了皮带机构特性、介质弹性体作动器特性和驱动系统测试的实验结果。通过实验测试表明，可以通过改变分析模型中定义的系统参数来微调初始预压缩量，并且预压缩量对后续的驱动输出幅值影响不大。
A common prophylaxis against peripheral vascular diseases utilizes pneumatic active compression systems. Although effective, traditional active compression systems require the use of an air compressor and pump and are, therefore, ill-suited for ambulatory use. The current work introduces a novel approach to developing an ambulatory smart material–based active compression system. The actuation system is composed of a belt-like mechanism connected in conjunction with a multi-layered dielectric elastomer actuator. The belt mechanism allows compression to be applied directly with voltage application. By doing so, the proposed design limits the period during which the actuator should be charged and improves system power efficiency and lifetime. An analytical model which defines the pre-compression exerted by the actuation system before voltage application is presented and validated experimentally. Experimental results for the belt mechanism characterization, dielectric elastomer actuator characterization and actuation system testing are presented. Through experimental testing, it is shown that the initial pre-compression can be fine-tuned by varying the parameters of the system as defined in the analytical model, and that the pre-compression has little effect on the consequent actuation output amplitudes.